"HELP"Z2 + Technics 1200mk2 in stand alone with rattle and crack

Hi everyone,

i´m new and have an annoying problem. My technics is connected to the Z2 phono input and the grounding cable to screw on the back too.
Nothing else is connected.
I can play and hear music but when i stop the record and tweak my headphones louder there is this annoying rattle and crack.
When i connect my krk speakers and tweak the booth u can hear it too.
It´s barely audible in normal room volume but when i increase it it´s audible.
My headphone poti is at 1pm position an it´s audible.
When i touch the the vinyl or case its a little bit better.
My tests so far are....

- tested with my second technics > same problem
- took the technics and Z2 and connected them in an other room with seperate socket Z2(kitchen) and technics (livin room) both 1 meter away from eachother > same problem
- bought this https://www.amazon.de/Hama-NF-Entst...XCXNXR9YE6F&psc=1&refRID=4FGT0DT27XCXNXR9YE6F > no rattle n cracks but a loud annoying ground hum and when i touch the technics cinch it comes a big noise on top
- i made a testrecord in ableton > the rattle n cracks are not recorded

I didnt find similar threads so i made this.
I dont know what to do ....its no cheap equipment and i´m not the only one with such a simple setup.
I also can make video so u could help me more.

I have a warrenty till end of the year.

 

Finally I found the problem. It's the rca cables of my technics... I connected a rca extension to the technics rca an the rattle was gone... But am I the only one with that problem????

 

Sounds like earthing issues.